Home / 21,312.12-31,991.22-9,008.76

Finding the Fourth Proportional to 21,312.12, 31,991.22 and 9,008.76

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Solution

The fourth proportional to 21,312.12, 31,991.22 and 9,008.76 is: 13,522.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.12 : 31,991.22 = 9,008.76 : x
  2. Step 2: Convert to fraction form
    21,312.12/31,991.22 = 9,008.76/x
  3. Step 3: Cross multiply
    21,312.12x = 31,991.22 × 9,008.76
  4. Step 4: Simplify right side
    21,312.12x = 288,201,223.09
  5. Step 5: Solve for x
    x = 288,201,223.09/21,312.12
  6. Step 6: Final answer
    x = 13,522.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.